. >> of course, vice president joe biden also took his second oath of office today. >> that i take this obligation freely. >> that i take this obligation freely. >> without any mental reservation or purpose of evasion. >> without any mental reservation or purpose of evasion. >> a and that i will well and faithfully discharge. >> and that i will well and faithfully discharge. >> the duties of the office on which i am about to enter. >> the duties of the office on which i am about to enter. >> so help me god. >> so help me god. >> congratulations. >> thank you. >> his service was at the naval observatory. the vice president's official residen residence. supreme court justice sonia sotomayor did the swearing in. >> the president and vice president traveled to arlington national cemetery and together took part in the traditional wreath-laying ceremony. >> the vice president will also take the oath of office tomorrow in a public ceremony. >> we're expecting up to 800,000 people in washington, d.c. for the ceremony tomorrow. compared to four years ago, it's nowhere even close. already this we